如今，流通硬币的“面值”（打在硬币表面的金额）比制造它所用的金属的价值要高。
Nowadays, the"face value"(value printed on its face)of circulating coins is higher than the value of the metal they are made from.
沿着楼梯，已经过穿孔处理的砖块带来了自然采光，为建筑的表面带来流通的印记。
Along the stairways, the brick has been perforated to bring in daylight and to project an imprint of the circulation on the building's facade.
综述了一种建立在表面作用力孔流通模型基础上计算高分子多孔滤过膜孔径大小及分布的方法。
A method based on the surface force pore flow model to characterize the pore size and pore size distribution of polymer porous filtration membranes was reviewed.
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